﻿/*
 * FCKeditor - The text editor for Internet - http://www.fckeditor.net
 * Copyright (C) 2003-2009 Frederico Caldeira Knabben
 *
 * == BEGIN LICENSE ==
 *
 * Licensed under the terms of any of the following licenses at your
 * choice:
 *
 *  - GNU General Public License Version 2 or later (the "GPL")
 *    http://www.gnu.org/licenses/gpl.html
 *
 *  - GNU Lesser General Public License Version 2.1 or later (the "LGPL")
 *    http://www.gnu.org/licenses/lgpl.html
 *
 *  - Mozilla Public License Version 1.1 or later (the "MPL")
 *    http://www.mozilla.org/MPL/MPL-1.1.html
 *
 * == END LICENSE ==
 *
 * FCKXml Class: class to load and manipulate XML files.
 */

FCKXml.prototype =
{
    LoadUrl : function( urlToCall )
    {
        this.Error = false ;

        var oXml ;
        var oXmlHttp = FCKTools.CreateXmlObject( 'XmlHttp' ) ;
        oXmlHttp.open( 'GET', urlToCall, false ) ;
        oXmlHttp.send( null ) ;

        if ( oXmlHttp.status == 200 || oXmlHttp.status == 304 || ( oXmlHttp.status == 0 && oXmlHttp.readyState == 4 ) )
        {
            oXml = oXmlHttp.responseXML ;
            // #1426: Fallback if responseXML isn't set for some
            // reason (e.g. improperly configured web server)
            if ( !oXml )
                oXml = (new DOMParser()).parseFromString( oXmlHttp.responseText, 'text/xml' ) ;
        }
        else
            oXml = null ;

        if ( oXml )
        {
            // Try to access something on it.
            try
            {
                var test = oXml.firstChild ;
            }
            catch (e)
            {
                // If document.domain has been changed (#123), we'll have a security
                // error at this point. The workaround here is parsing the responseText:
                // http://alexander.kirk.at/2006/07/27/firefox-15-xmlhttprequest-reqresponsexml-and-documentdomain/
                oXml = (new DOMParser()).parseFromString( oXmlHttp.responseText, 'text/xml' ) ;
            }
        }

        if ( !oXml || !oXml.firstChild )
        {
            this.Error = true ;
            if ( window.confirm( 'Error loading "' + urlToCall + '" (HTTP Status: ' + oXmlHttp.status + ').\r\nDo you want to see the server response dump?' ) )
                alert( oXmlHttp.responseText ) ;
        }

        this.DOMDocument = oXml ;
    },

    SelectNodes : function( xpath, contextNode )
    {
        if ( this.Error )
            return new Array() ;

        var aNodeArray = new Array();

        var xPathResult = this.DOMDocument.evaluate( xpath, contextNode ? contextNode : this.DOMDocument,
                this.DOMDocument.createNSResolver(this.DOMDocument.documentElement), XPathResult.ORDERED_NODE_ITERATOR_TYPE, null) ;
        if ( xPathResult )
        {
            var oNode = xPathResult.iterateNext() ;
            while( oNode )
            {
                aNodeArray[aNodeArray.length] = oNode ;
                oNode = xPathResult.iterateNext();
            }
        }
        return aNodeArray ;
    },

    SelectSingleNode : function( xpath, contextNode )
    {
        if ( this.Error )
            return null ;

        var xPathResult = this.DOMDocument.evaluate( xpath, contextNode ? contextNode : this.DOMDocument,
                this.DOMDocument.createNSResolver(this.DOMDocument.documentElement), 9, null);

        if ( xPathResult && xPathResult.singleNodeValue )
            return xPathResult.singleNodeValue ;
        else
            return null ;
    }
} ;
